oil on driveway
 

i had an oil leak and now its fixed. so how do i get the oil off the concret?
thanks

chemdry works well for hydraulic fluid, atf, gear oil, oil available at napa i belive its been awhile since i bought some i get it in 100lb bags

muratic acid I think works.
How to Clean Oil Spots From a Garage or Driveway | eHow.com

ya untill your conctrete starts chipping away

Have you tried Simple Green?

Another good thing is Tri Sodium Phosphate....make sure you wear gloves, safety glasses and us LOTS of water to rinse it away.


http://en.wikipedia.org/wiki/Trisodium_phosphate

gasoline......... im telling you from expereince.. it works....

Eventually the sun will bleach out the oil stains.

This is from my previous post. Note that the muratic acid is a last resort, and it says to sprinkle on baking soda to neutralize the chemicals.


Instructions
Difficulty: Moderate
Things You’ll Need:

* Muriatic acid (available at a hardware or janitorial supply store)
* Stiff Brush Or Push Broom
* Garden Hose
* Plastic Bucket
* Commercial Concrete Cleaner Or Grease Solvent
* Cola
* Safety Goggles
* Automatic Dishwasher Detergent
* Rubber Or Latex Gloves
* Dishwashing Liquid
* Pressure washer (to rent one, look under Pressure Washing Equipment in the yellow pages)
* Baking soda, cornmeal or sawdust
* TSP

Step1
Pour cola on the oily or dry stained areas, and leave the cola on overnight. Squirt a generous amount of dishwashing liquid into a bucket until you have a good lather. Rinse with the soapy water, then with a garden hose.
Step2
Sprinkle baking soda or an absorbent powder such as cornmeal or sawdust on the oily spots. If the stain is dry, wet it first to make a scouring paste. Scrub with a stiff brush or push broom.
Step3
Sprinkle automatic dishwasher detergent on the oily concrete. Leave it for several minutes, then pour boiling water on the stained area. Scrub with a stiff brush or push broom, then rinse.
Step4
Try a commercial concrete cleaner such as Garage and Driveway Cleaner by Red Devil Co. or a grease solvent such as Benzine. Follow the manufacturer's instructions.
Step5
Sprinkle trisodium phosphate (TSP) on the oily concrete. If the stain is dry, wet it first. Let it stand for 30 minutes. Scrub using a stiff broom. TSP is a dangerous product; if you must use it, wear rubber or latex gloves, safety goggles and protective clothing. Also, never wash a TSP product down storm drains.
Step6
As a last resort, combat tough spills with muriatic acid and a pressure washer. Apply the acid following the manufacturer's directions, and let it soak for several seconds. Follow with a pressure washer set at 2,500 to 3,000 lbs. per square inch (psi), or 176 to 211 kg per square cm. Like TSP, muriatic acid is a dangerous product; likewise, if you must use it, wear rubber or latex gloves, safety goggles and protective clothing, and never wash such a product down storm drains.
Step7
After trying any of the strategies above, sprinkle baking soda over the cleaned area to neutralize the solution you've used.

Xylene works great for that, especially concrete in the garage. Its pretty much like paint thinner but instead of smeiring it like thinner does it will kindof soat it up. Just pour a puddle.. scrub with a rag, and hang the rang up somewhere safe. Anything that comes into contact with thinner or xylene im cautious of combustion.

Might be an idea to wear a filter respirator if using Xylene.